I am a new P38 owner (at least its new to me) , the previous owner gave me 2 keys/remotes 1 recently just stopped working I change the batery's but the ligh wont come on when depressed and the other isnt programmed to the vehicle. Does anyone know how to program a remote?

Also the check engine light is on I have had the codes read and did some research on them they are

P0116
Engine Coolant Temperature Sensor Falling Temp Fault


P0125
Engine Coolant Temp Sensor Warm Up Fault


and

P0118
Engine Coolant Temperature Sensor High Out of Range Fault

assumably there is an engine coolant issue, I dont know how to reset the light on this vehicle to confirm that there is an issue can I get a little direction from you fine people?!?!?

Thanks....

rqchildress@bellsouth.net